$schemamarkup = get_post_meta(get_the_ID(), 'schemamarkup', true); if(!empty($schemamarkup)) { echo $schemamarkup; }

How to Install Epson XP-630/XP-640 Series Printer/Scanner on Gnu/Linux Distros

GNU/Linux Epson XP-630/XP-640 Printer Setup – QuickStart Guide

Hi! The linked Tutorial shows you Step-by-Step How to Install Epson Expression Premium XP-630/XP-640 Series Printer in GNU/Linux Desktops.

And to achieve the Epson XP-630/XP-640 Linux Installation you need to Setup the Proprietary Driver.

Moreover, the guides includes also detailed instructions on How to Install Epson XP-630/XP-640 Printer Utility for Linux.

Finally, using the Epson Printer Utility Software you can check: Ink Levels, View Error and other Status…

Epson XP-630/XP-640 Series Printer - Featured

GNU/Linux Install Epson XP-630/XP-640 Driver Guide